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huhnmonster | 5 years ago

There are a bunch of other technologies as well. Huge flywheels [1], which are supposed to be used for very responsive power needs (i.e. grid stabilisation), trains loaded with weights which get pulled up a mountain and released [2], redox-flow batteries and so on.

[1]: https://www.energydigital.com/smart-energy/worlds-largest-fl... [2]: https://aresnorthamerica.com/

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taeric|5 years ago

Seems the train idea is similar to the old counterbalance system for trollies in Seattle.

imtringued|5 years ago

Hydro pump storage works because you don't have to pay for the weights. Building a train is worse than batteries in terms of economics.